US20120279255A1 - Method and apparatus for compressing and cooling air - Google Patents

Method and apparatus for compressing and cooling air Download PDF

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Publication number
US20120279255A1
US20120279255A1 US13/511,423 US201013511423A US2012279255A1 US 20120279255 A1 US20120279255 A1 US 20120279255A1 US 201013511423 A US201013511423 A US 201013511423A US 2012279255 A1 US2012279255 A1 US 2012279255A1
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United States
Prior art keywords
heat exchanger
air
water
gas
stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/511,423
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English (en)
Inventor
Benoit Davidian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Assigned to L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE reassignment L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DAVIDIAN, BENOIT
Publication of US20120279255A1 publication Critical patent/US20120279255A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04236—Integration of different exchangers in a single core, so-called integrated cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/06—Adiabatic compressor, i.e. without interstage cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream

Definitions

  • the present invention relates to a process and to an apparatus for compressing and cooling air by indirect heat exchange.
  • the air after it has been compressed, must be cooled as much as possible before entering the purification cylinders, in order to reduce the sizes thereof. It is proposed to simplify the cooling system.
  • gaseous products resulting from the cold box preferably all of the gaseous products, in order to cool the wet air, in a heat exchanger.
  • a portion of the water condensed during the cooling of air in the proposed system, and also that resulting from the compression of the gas, will be injected into gases resulting from the cold box.
  • This system makes it possible to dispense with a dryer or a refrigerating unit, associated cooler problems, and optionally a water/nitrogen tower.
  • the heat exchanger will be able to be integrated into the main exchange line where the air is cooled to a cryogenic temperature upstream of the distillation.
  • a process for compressing and cooling air upstream of a cryogenic air separation plant wherein:
  • an air separation process comprising a process for compressing and cooling air as claimed in one of the preceding claims, wherein the purified air is cooled in a second heat exchanger and sent to a column of the cryogenic separation plant, at least one product is withdrawn from the plant and heated in the second heat exchanger and then in the first heat exchanger and at least one product is withdrawn from the plant, heated, optionally vaporized, in the second heat exchanger and then, in gas form, in the first heat exchanger.
  • an apparatus for compressing and cooling air intended for a cryogenic separation plant comprising a compressor, a first heat exchanger by indirect heat exchange, a purification unit, one or two separators, the compressor being connected to the first heat exchanger and the first heat exchanger being connected to the purification unit, the apparatus not comprising means of cooling air by direct exchange upstream of the first heat exchanger, the purification unit being suitable for sending purified air to the plant, the separator(s) being connected
  • the apparatus comprises:
  • a plant for the cryogenic separation of air by distillation, comprising an apparatus as claimed in one of claims 11 to 14 , a system comprising at least one column, a second heat exchanger, a line for conveying air from the second heat exchanger to a column of the system and a line for conveying a distillation product to the second heat exchanger.
  • the invention is described in the case of a nitrogen generator, but may be extrapolated to other types of generators.
  • the air 1 is sent to a compressor 3 .
  • the compressor 3 may be an isothermal compressor, but the example shows an adiabatic compressor.
  • the air compressed to 5 to 9 bar absolute and at 320° C. is cooled in a compressor cooler 6 by indirect heat exchange, to 27° C., then the water condensed is separated in a first separator 7 , which may be integrated into the cooler of the compressor.
  • the condensed water 11 is sent to a buffer tank 25 .
  • the air 9 is cooled in a first indirect heat-exchange heat exchanger 13 , for example a plate-fin heat exchanger, against all the gaseous fluids 37 , 39 , 41 resulting from the cold box 33 .
  • the gaseous fluids are heated in the first heat exchanger 13 to 21° C.
  • the water 19 condensed in the second separator 15 is sent to the buffer tank 25 .
  • the air 17 thus cooled to 10° C. then goes to the overhead purification 45 .
  • the gas production 37 , 43 is sent to the countercurrent heat exchanger.
  • the stream 37 is pure gaseous nitrogen and the stream 43 is rich vaporized liquid originating from the overhead condenser of a single column for producing nitrogen, illustrated schematically. It will be readily understood that in the case of an application having a double column, the stream 37 could be gaseous oxygen or gaseous nitrogen and the stream 43 would be more or less pure gaseous nitrogen.
  • the residual fluid 43 at 10° C. and at atmospheric pressure (apart from the pressure drop from equipment downstream) is split into two portions 39 , 41 : one portion 41 , which remains dry, which is used for regeneration of the purification 45 after heating in the heater 42 , another portion 39 , which will be humidified and cooled by injecting water 29 , 31 resulting from the condensates. All the water contained in the gas 39 originates from the condensation of water in the air, either upstream or downstream of the first heat exchanger ( 13 ).
  • the injection of water may be carried out either completely before the heat exchanger (stream 29 ), or partly before (stream 29 ) until saturation of the gas, then along the heat exchanger (stream 31 ), optionally with several injection points.
  • the injection could optionally be carried out using a pump 23 , or directly using the pressurized condensates.
  • the buffer tank 25 may be optional.
  • the separator 7 or the separator 15 may be eliminated, for example by being integrated into another piece of equipment.
  • the amount of water injected so as to be at most saturated on exiting the heat exchanger 13 will be limited to avoid sending water droplets into the atmosphere. This amount could be evaluated by calculation as a function of the operating parameters of the heat exchanger.
  • the chosen temperature of the air 17 at the outlet of the heat exchanger 13 before purification will be such that the temperature of the fluid that is saturated (or supersaturated) with water at the heat exchanger fluid inlet remains positive, to avoid the risk of ice formation and therefore of blockage.
  • the water used will originate from the ambient air (humidity) recovered in the condensates 11 , 19 . No particular treatment of these condensates will be needed.
  • the first air-cooling exchanger 13 may be integrated into the main exchange line 35 (second heat exchanger) of the cold box where purified air 17 originating from the purification 45 is cooled upstream of the distillation columns and where the residual nitrogen 43 is heated.
  • the compressed air will then be withdrawn at an intermediate level of the integrated heat exchanger ( 13 and 35 ), then sent to the purification before returning to the exchange line, and the water will be injected into the fluid to be saturated along the top part of the heat exchanger.
  • the introduction of the liquid could be carried out according to conventional techniques for injecting liquid into a gas in a plate heat exchanger, typically used for example for two-phase introductions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US13/511,423 2009-11-23 2010-11-22 Method and apparatus for compressing and cooling air Abandoned US20120279255A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0958248 2009-11-23
FR0958248 2009-11-23
PCT/FR2010/052481 WO2011061459A2 (fr) 2009-11-23 2010-11-22 Procede et appareil de compression et de refroidissement d'air

Publications (1)

Publication Number Publication Date
US20120279255A1 true US20120279255A1 (en) 2012-11-08

Family

ID=42357816

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/511,423 Abandoned US20120279255A1 (en) 2009-11-23 2010-11-22 Method and apparatus for compressing and cooling air

Country Status (5)

Country Link
US (1) US20120279255A1 (fr)
EP (1) EP2504647B1 (fr)
JP (1) JP2013525718A (fr)
CN (1) CN103109145B (fr)
WO (1) WO2011061459A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113494845A (zh) * 2020-04-03 2021-10-12 田渕海运株式会社 船仓干燥系统以及船仓干燥方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982356A1 (fr) * 2011-11-09 2013-05-10 Air Liquide Procede et appareil de separation d'air par distillation cryogenique
CN104132506A (zh) * 2014-05-25 2014-11-05 刘晓 超级空气净化应用系统
DE102018205890A1 (de) * 2018-04-18 2019-10-24 Röchling Automotive SE & Co. KG Kontinuierlich arbeitende Wasser-Gewinnungsvorrichtung für ein Kraftfahrzeug
FR3099151B1 (fr) * 2019-07-24 2021-06-18 Air Liquide Appareil de compression et de separation et procede de compression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224209A (en) * 1960-01-28 1965-12-21 Union Carbide Corp Process and apparatus for purifying and separating compressed gas mixtures
US3967464A (en) * 1974-07-22 1976-07-06 Air Products And Chemicals, Inc. Air separation process and system utilizing pressure-swing driers
US5251451A (en) * 1992-08-28 1993-10-12 Air Products And Chemicals, Inc. Multiple reboiler, double column, air boosted, elevated pressure air separation cycle and its integration with gas turbines
US6295835B1 (en) * 1999-02-01 2001-10-02 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for air separation by cryogenic distillation
US6295838B1 (en) * 2000-08-16 2001-10-02 Praxair Technology, Inc. Cryogenic air separation and gas turbine integration using heated nitrogen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998751A (en) * 1963-07-18 1965-07-21 British Oxygen Co Ltd Air separation process
US3358460A (en) * 1965-10-08 1967-12-19 Air Reduction Nitrogen liquefaction with plural work expansion of feed as refrigerant
JPH06185855A (ja) * 1992-12-18 1994-07-08 Hitachi Ltd 原料空気冷却方法
FR2753636B1 (fr) * 1996-09-25 2001-11-09 Air Liquide Procede et installation pour l'alimentation pour un appareil de separation d'air
US6912859B2 (en) * 2002-02-12 2005-07-05 Air Liquide Process And Construction, Inc. Method and apparatus for using a main air compressor to supplement a chill water system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224209A (en) * 1960-01-28 1965-12-21 Union Carbide Corp Process and apparatus for purifying and separating compressed gas mixtures
US3967464A (en) * 1974-07-22 1976-07-06 Air Products And Chemicals, Inc. Air separation process and system utilizing pressure-swing driers
US5251451A (en) * 1992-08-28 1993-10-12 Air Products And Chemicals, Inc. Multiple reboiler, double column, air boosted, elevated pressure air separation cycle and its integration with gas turbines
US6295835B1 (en) * 1999-02-01 2001-10-02 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for air separation by cryogenic distillation
US6295838B1 (en) * 2000-08-16 2001-10-02 Praxair Technology, Inc. Cryogenic air separation and gas turbine integration using heated nitrogen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113494845A (zh) * 2020-04-03 2021-10-12 田渕海运株式会社 船仓干燥系统以及船仓干燥方法

Also Published As

Publication number Publication date
WO2011061459A2 (fr) 2011-05-26
CN103109145B (zh) 2015-10-14
CN103109145A (zh) 2013-05-15
EP2504647A2 (fr) 2012-10-03
WO2011061459A3 (fr) 2014-03-20
JP2013525718A (ja) 2013-06-20
EP2504647B1 (fr) 2019-02-20

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Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DAVIDIAN, BENOIT;REEL/FRAME:028451/0610

Effective date: 20120420

STCB Information on status: application discontinuation

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